Merge tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost
[cris-mirror.git] / arch / sparc / lib / NGpatch.S
blobe9f843f1063ede7fca60fcb901afe5c13768b689
1 /* SPDX-License-Identifier: GPL-2.0 */
2 /* NGpatch.S: Patch Ultra-I routines with Niagara variant.
3  *
4  * Copyright (C) 2006 David S. Miller <davem@davemloft.net>
5  */
7 #define BRANCH_ALWAYS   0x10680000
8 #define NOP             0x01000000
9 #define NG_DO_PATCH(OLD, NEW)   \
10         sethi   %hi(NEW), %g1; \
11         or      %g1, %lo(NEW), %g1; \
12         sethi   %hi(OLD), %g2; \
13         or      %g2, %lo(OLD), %g2; \
14         sub     %g1, %g2, %g1; \
15         sethi   %hi(BRANCH_ALWAYS), %g3; \
16         sll     %g1, 11, %g1; \
17         srl     %g1, 11 + 2, %g1; \
18         or      %g3, %lo(BRANCH_ALWAYS), %g3; \
19         or      %g3, %g1, %g3; \
20         stw     %g3, [%g2]; \
21         sethi   %hi(NOP), %g3; \
22         or      %g3, %lo(NOP), %g3; \
23         stw     %g3, [%g2 + 0x4]; \
24         flush   %g2;
26         .globl  niagara_patch_copyops
27         .type   niagara_patch_copyops,#function
28 niagara_patch_copyops:
29         NG_DO_PATCH(memcpy, NGmemcpy)
30         NG_DO_PATCH(raw_copy_from_user, NGcopy_from_user)
31         NG_DO_PATCH(raw_copy_to_user, NGcopy_to_user)
32         retl
33          nop
34         .size   niagara_patch_copyops,.-niagara_patch_copyops